package com.heima.search.service.impl;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.search.pojos.ApAssociateWords;
import com.heima.search.service.ApAssociateWordsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class ApAssociateWordsServiceImpl implements ApAssociateWordsService {
    @Autowired
    private MongoTemplate mongoTemplate;

    /**
     * 联想词
     * @param userSearchDto
     * @return
     */
    @Override
    public ResponseResult findAssociate(UserSearchDto userSearchDto) {
        //参数检验
        if(userSearchDto == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页检查,当查询页数大于20,只查询20条
        if(userSearchDto.getPageSize() > 20){
            userSearchDto.setPageSize(20);
        }
        //执行查询 模糊查询
        List<ApAssociateWords> words = mongoTemplate.find(Query.query(
                Criteria.where("associateWords")
                        .regex(".*?\\" + userSearchDto.getSearchWords() + ".*"))
                        .limit(userSearchDto.getPageSize())
                , ApAssociateWords.class);
        return ResponseResult.okResult(words);
    }
}
